[1] Washington Univ, Sch Med, Mallinckrodt Inst Radiol, 510 S Kingshighway Blvd,Campus Box 8131, St Louis, MO 63110 USA
[2] Eastern Virginia Med Sch, Dept Radiol, Norfolk, VA 23501 USA
[3] Temple Univ Hosp & Med Sch, Dept Radiol, Philadelphia, PA 19140 USA
[4] Univ Ottawa, Dept Radiol, Ottawa, ON, Canada
[5] Emory Univ Hosp Midtown, Dept Radiol & Imaging Sci, Atlanta, GA USA
[6] Univ Massachusetts, Dept Radiol, Med Sch, Worcester, MA USA
[7] Harvard Med Sch, Brigham & Womens Hosp, Dept Radiol, Boston, MA USA
[8] Univ Washington, Sch Med, Dept Radiol, Seattle, WA 98195 USA
[9] Univ S Florida, Morsani Coll Med, Dept Radiol, Tampa, FL USA
[10] Wake Forest Sch Med, Med Ctr Blvd, Winston Salem, NC USA